WO2021162480A1 - Procédé et appareil de rétroaction de harq-ack dans un système de communication sans fil - Google Patents

Procédé et appareil de rétroaction de harq-ack dans un système de communication sans fil Download PDF

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Publication number
WO2021162480A1
WO2021162480A1 PCT/KR2021/001836 KR2021001836W WO2021162480A1 WO 2021162480 A1 WO2021162480 A1 WO 2021162480A1 KR 2021001836 W KR2021001836 W KR 2021001836W WO 2021162480 A1 WO2021162480 A1 WO 2021162480A1
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WIPO (PCT)
Prior art keywords
terminal
base station
feedback information
cbg
dfi
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PCT/KR2021/001836
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English (en)
Korean (ko)
Inventor
방종현
오진영
류현석
박성진
신철규
여정호
Original Assignee
삼성전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority claimed from KR1020200042982A external-priority patent/KR20210103901A/ko
Application filed by 삼성전자 주식회사 filed Critical 삼성전자 주식회사
Priority to CN202180014448.7A priority Critical patent/CN115104271A/zh
Priority to EP23174327.9A priority patent/EP4236168A3/fr
Priority to EP21754321.4A priority patent/EP4089944A4/fr
Priority to US17/798,223 priority patent/US20230118350A1/en
Publication of WO2021162480A1 publication Critical patent/WO2021162480A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1864—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/187—Details of sliding window management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0006—Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal

Definitions

  • the present disclosure relates to a HARQ-ACK feedback method and apparatus in a wireless communication system. More specifically, in a wireless communication system, in particular, a system and a node for receiving an uplink signal in an unlicensed band, or a system and a node for transmitting a downlink signal, information indicating failure or success of decoding an uplink signal to transmit an uplink signal It relates to a system and a method of delivering it to a node.
  • the 5G communication system or the pre-5G communication system is called a system after the 4G network (Beyond 4G Network) communication system or after the LTE system (Post LTE).
  • 4G network Beyond 4G Network
  • LTE system Post LTE
  • the 5G communication system is being considered for implementation in a very high frequency (mmWave) band (eg, such as a 60 gigabyte (60 GHz) band).
  • mmWave very high frequency
  • FD-MIMO Full Dimensional MIMO
  • array antenna, analog beam-forming, and large scale antenna technologies are being discussed.
  • an evolved small cell in order to improve the network performance of the system, in the 5G communication system, an evolved small cell, an advanced small cell, a cloud radio access network (cloud RAN), an ultra-dense network (ultra-dense) network), Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and reception interference Cancellation) is being developed.
  • cloud RAN cloud radio access network
  • ultra-dense network ultra-dense network
  • D2D Device to Device communication
  • wireless backhaul moving network
  • cooperative communication Coordinated Multi-Points (CoMP), and reception interference Cancellation
  • FQAM Hybrid FSK and QAM Modulation
  • SWSC Small Cell Superposition Coding
  • ACM advanced coding modulation
  • FBMC Fan Bank Multi Carrier
  • NOMA non orthogonal multiple access
  • SCMA sparse code multiple access
  • IoT Internet of Things
  • IoE Internet of Everything
  • M2M Machine Type Communication
  • MTC Machine Type Communication
  • IoT an intelligent IT (Internet Technology) service that collects and analyzes data generated from connected objects and creates new values in human life can be provided.
  • IoT is a field of smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliance, advanced medical service, etc. can be applied to
  • 5G communication technology is implemented by techniques such as beam forming, MIMO, and array antenna.
  • cloud RAN cloud radio access network
  • An object of the present disclosure is to provide a HARQ-ACK feedback method and apparatus in a wireless communication system.
  • An embodiment of the present disclosure receives, from a base station, first configuration information for CBG (Code Block Group)-based uplink transmission, and second configuration information including a DFI (Downlink Feedback Information) bitmap configuration scheme, and the Transmitting the CBG-based uplink signal to the base station based on the first configuration information, and based on the second configuration information, the DFI including feedback information for the CBG-based uplink signal from the base station It is possible to provide a terminal that receives and determines a contention interval value of the terminal based on the feedback information included in the received DFI.
  • CBG Code Block Group
  • second configuration information including a DFI (Downlink Feedback Information) bitmap configuration scheme
  • 1 is a diagram illustrating an uplink/downlink time-frequency domain transmission structure of an NR system.
  • FIG. 2 is a diagram for explaining a channel access procedure in an unlicensed band.
  • FIG. 3 is a diagram illustrating a downlink to uplink scheduling method and a resource region in an NR system.
  • FIG. 4 is a diagram illustrating a downlink to uplink scheduling method and a resource region in an NR system.
  • FIG. 5 is a diagram illustrating an embodiment of the present disclosure.
  • FIG. 6 is a diagram illustrating another embodiment of the present disclosure.
  • FIG. 7 is a diagram illustrating another embodiment of the present disclosure.
  • FIG. 8 is a flowchart illustrating an operation of a base station according to an embodiment of the present disclosure.
  • FIG. 9 is a flowchart illustrating an operation of a terminal according to an embodiment of the present disclosure.
  • FIG. 10 is a block diagram illustrating a structure of a base station according to an embodiment of the present disclosure.
  • FIG. 11 is a block diagram illustrating a structure of a terminal according to an embodiment of the present disclosure.
  • a method for a terminal to transmit/receive data and feedback in a wireless communication system includes: a base station transmitting DFI determination information related information; a base station configuring a DFI bitmap; Receiving DFI determination related information from the base station, as the DFI is received based on the set DFI determination related information from the base station, decoding the DFI bitmap and adjusting the retransmission and contention interval values by the terminal. have.
  • a terminal for transmitting and receiving data in a wireless communication system includes a transceiver and at least one processor, wherein the at least one processor is configured to receive a Code Block Group (CBG)-based uplink from a base station.
  • Receives second configuration information including first configuration information for transmission and a Downlink Feedback Information (DFI) bitmap configuration method and transmits the CBG-based uplink signal to the base station based on the first configuration information and, based on the second configuration information, receive a DFI including feedback information for the CBG-based uplink signal from the base station, and based on the feedback information included in the received DFI, contention of the terminal
  • the interval value can be determined.
  • the DFI bitmap configuration method may indicate whether feedback in units of TB (Transport Block) or feedback for one or more CBGs.
  • the CBG-based uplink signal includes one or more uplink signals transmitted in a first slot
  • the at least one processor based on the second configuration information, receives the
  • the contention interval value is set to the first contention interval
  • the contention interval value may be determined as the value of the second contention interval when it is determined as a value or maintained as the current contention interval value and all of the feedback information for one or more uplinks transmitted in the first slot is NACK.
  • the current contention period value may be greater than or equal to the first contention period value, and may be less than or equal to the second contention period value.
  • the at least one processor identifies the feedback information included in the received DFI as feedback information in units of CBG, based on the second configuration information, and includes the feedback information included in the received DFI. Based on the feedback information, determine feedback information of CBGs constituting each of the plurality of slots, and based on the feedback information of CBGs constituting each of the determined plurality of slots, CBG for a reference slot including the plurality of slots.
  • the ACK/NACK ratio of the unit may be determined, and the contention interval value may be changed or maintained based on the determined ratio.
  • the feedback information included in the DFI includes feedback information on one or more CBG-based uplink signals transmitted in a first slot, and one or more CBGs transmitted in the first slot.
  • the feedback information on the base uplink signals is independent of whether one or more CBG-based uplink signals transmitted in the first slot are retransmitted, and may be used to determine the contention interval value of the terminal.
  • the at least one processor receives UL (Uplink) grant DCI (Downlink Control Information) including feedback information in TB units or CBG units for the CBG-based uplink signal from the base station.
  • UL (Uplink) grant DCI Downlink Control Information
  • the contention interval value of the terminal may be determined based on at least one of feedback information included in the received DFI and feedback information included in the UL grant DCI.
  • the feedback information included in the DFI includes feedback information on one or more CBG-based uplink signals transmitted in a first slot corresponding to a reference slot
  • the at least one processor Receives a UL grant DCI including feedback information in TB units or CBG units for the CBG-based uplink signal from the base station, and the UL grant DCI is received before the DFI or the UL grant DCI
  • the reference slot is the first slot after reception and no other uplink signal is transmitted after receiving the DFI, it may be used to determine the contention interval value of the terminal.
  • the CBG-based uplink signal may include an uplink signal scheduled from the base station.
  • a base station for transmitting and receiving data in a wireless communication system includes a transceiver and at least one processor, wherein the at least one processor provides a CBG (Code Block Group)-based uplink to the terminal.
  • First configuration information for link transmission and second configuration information including a DFI (Downlink Feedback Information) bitmap configuration scheme are transmitted, and based on the first configuration information, the CBG-based uplink signal is transmitted to the base station.
  • receiving, and decoding the received CBG-based uplink signal in units of CBG based on the second configuration information, and based on the decoding result, feedback information on the CBG-based uplink signal to the terminal Transmits a DFI including It may indicate whether it is feedback of , or feedback for one or more CBGs.
  • the feedback information included in the DFI includes feedback information on one or more CBG-based uplink signals transmitted in a first slot, and one or more CBGs transmitted in the first slot.
  • the feedback information on the base uplink signals is independent of whether one or more CBG-based uplink signals transmitted in the first slot are retransmitted, and may be used to determine the contention interval value of the terminal.
  • the at least one processor provides the UE with an UL (Uplink) grant DCI (Downlink Control Information) including feedback information in TB units or CBG units for the CBG-based uplink signal. and the contention interval value of the UE may be determined based on at least one of feedback information included in the DFI and feedback information included in the UL grant DCI.
  • UL Uplink
  • DCI Downlink Control Information
  • the CBG-based uplink signal may include an uplink signal scheduled from the base station.
  • a method of operating a terminal for transmitting and receiving data in a wireless communication system includes first configuration information and Downlink Feedback Information (DFI) for uplink transmission based on Code Block Group (CBG) from a base station. ) receiving second setting information including a bitmap configuration method; transmitting the CBG-based uplink signal to the base station based on the first configuration information; receiving a DFI including feedback information for the CBG-based uplink signal from the base station based on the second configuration information; and determining a contention interval value of the terminal based on the received feedback information included in the DFI, wherein the DFI bitmap configuration method is a TB (Transport Block) unit feedback or one or more CBGs. You can indicate whether it is feedback or not.
  • DFI Downlink Feedback Information
  • each block of the flowchart diagrams and combinations of the flowchart diagrams may be performed by computer program instructions.
  • These computer program instructions may be embodied in a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, such that the instructions performed by the processor of the computer or other programmable data processing equipment are not described in the flowchart block(s). It creates a means to perform functions.
  • These computer program instructions may also be stored in a computer-usable or computer-readable memory that may direct a computer or other programmable data processing equipment to implement a function in a particular manner, and thus the computer-usable or computer-readable memory.
  • the instructions stored in the flow chart block(s) produce an article of manufacture containing instruction means for performing the function described in the flowchart block(s).
  • the computer program instructions may also be mounted on a computer or other programmable data processing equipment, such that a series of operational steps are performed on the computer or other programmable data processing equipment to create a computer-executed process to create a computer or other programmable data processing equipment. It is also possible that instructions for performing the processing equipment provide steps for performing the functions described in the flowchart block(s).
  • each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing specified logical function(s). It should also be noted that in some alternative implementations it is also possible for the functions recited in blocks to occur out of order. For example, two blocks shown one after another may in fact be performed substantially simultaneously, or it is possible that the blocks are sometimes performed in the reverse order according to the corresponding function.
  • the term ' ⁇ unit' used in this embodiment means software or hardware components such as FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit), and ' ⁇ unit' performs certain roles do.
  • '-part' is not limited to software or hardware.
  • the ' ⁇ unit' may be configured to reside on an addressable storage medium or may be configured to refresh one or more processors.
  • ' ⁇ ' denotes components such as software components, object-oriented software components, class components, and task components, and processes, functions, properties, and procedures. , subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables.
  • components and ' ⁇ units' may be combined into a smaller number of components and ' ⁇ units' or further separated into additional components and ' ⁇ units'.
  • components and ' ⁇ units' may be implemented to play one or more CPUs in a device or secure multimedia card.
  • ' ⁇ bu' may include one or more processors.
  • eMBB enhanced mobile broadband
  • URLLC ultra-reliable and low latency communication
  • mMTC massive device-to-device communication service
  • machine type communication eMBMS: evolved multimedia broadcast/multicast Service
  • the system providing the URLLC service may be referred to as a URLLC system
  • the system providing the eMBB service may be referred to as an eMBB system.
  • the terms service and system may be used interchangeably.
  • a plurality of services may be provided to a user in a communication system, and in order to provide such a plurality of services to a user, a method and an apparatus using the same are required to provide each service within the same time period according to characteristics. .
  • a downlink signal transmitted by the base station to the terminal through a physical downlink control channel (PDCCH) is Downlink control information (DCI) including transmitted resource allocation information is transmitted to the UE to transmit downlink control information (eg, Channel-State Information Reference Signal (CSI-RS)), or a broadcast channel (Physical Broadcast CHannel (PBCH), or downlink data channel (Physical Downlink Shared CHannel (PDSCH)) can be configured to receive at least one downlink signal.
  • DCI Downlink control information
  • CSI-RS Channel-State Information Reference Signal
  • PBCH Physical Broadcast CHannel
  • PDSCH Physical Downlink Shared CHannel
  • the base station transmits the PDCCH to the terminal in subframe n.
  • the base station transmits downlink control information (DCI) instructing to receive the PDSCH in subframe n through
  • DCI downlink control information
  • the base station transmits downlink control information (DCI) including uplink resource allocation information to the terminal through a downlink control channel (PDCCH), so that the terminal transmits the uplink At least one uplink signal of control information (eg, Sounding Reference Signal (SRS) or Uplink Control Information (UCI), or Physical Random Access CHannel (PRACH)) or an uplink data channel (Physical Uplink Shared CHannel (PUSCH)) can be set to be transmitted to the base station, for example, uplink transmission configuration information transmitted from the base station through the PDCCH (or The terminal receiving the uplink DCI or UL grant) in subframe n, a predefined time (eg, n+4) or a time set through a higher signal (eg, n+k), or According to the uplink signal transmission time indicator information (eg, n+k) included in the uplink
  • the transmitting device is a set signal transmission start time Perform a channel access procedure (Channel access procedure, or LBT: listen-before talk) for the unlicensed band in which the signal transmission is set before or immediately before, and according to the result of the channel access procedure, if the unlicensed band is in an idle state If it is determined that it is possible to access (access) the unlicensed band to perform the set signal transmission.
  • a channel access procedure Channel access procedure, or LBT: listen-before talk
  • the channel access procedure in the unlicensed band in which the signal transmission is set is generally a predetermined time in the transmitting device or a time calculated according to a predefined rule (eg, calculated through at least one random value selected by the base station or the terminal) time) during which the signal is received in the unlicensed band, and the strength of the received signal is defined in advance, or at least of a channel bandwidth or a bandwidth of a signal through which a signal to be transmitted is transmitted, the strength of transmission power, a beam width of a transmission signal, etc. It is possible to determine the idle state of the unlicensed band by comparing it with a threshold calculated by a function composed of one or more variables.
  • the maximum possible time of the signal transmission is the maximum channel occupancy time defined for each country and region in the unlicensed band or the type of transmission device (eg, a base station or a terminal, or a master device or a slave device) may be limited according to For example, in Japan, in the 5 GHz unlicensed band, a base station or a terminal may transmit a signal by occupying the channel without performing an additional channel access procedure for up to 4 ms after performing the channel access procedure. If the signal strength received for 25us is greater than the predefined threshold of -72dBm, the base station determines that the unlicensed band is not in an idle state, and does not transmit a signal.
  • a wireless communication system for example, 3GPP's HSPA (High Speed Packet Access), LTE (Long Term Evolution or E-UTRA (Evolved Universal Terrestrial Radio Access)), LTE-Advanced (LTE-A), 3GPP2 HRPD (High Rate Packet Data), UMB (Ultra Mobile Broadband), and IEEE 802.16e, such as communication standards such as communication standards, such as high-speed, high-quality packet data service is developed as a broadband wireless communication system are doing
  • a communication standard of 5G or NR (new radio) is being made as a 5G wireless communication system.
  • eMBB Enhanced mobile broadband
  • mMTC massive machine type communications
  • URLLC Ultra-Reliable and low-latency Communications
  • the services may be provided to the same terminal during the same time period.
  • eMBB may be a high-speed transmission of high-capacity data
  • mMTC may be a service that minimizes terminal power and multiple terminals are connected
  • URLLC may be a service targeting high reliability and low latency, but is not limited thereto.
  • the three services may be major scenarios in an LTE system or a system such as 5G/NR (new radio, next radio) after LTE.
  • the base station schedules data corresponding to the eMBB service to a certain terminal in a specific transmission time interval (TTI)
  • TTI transmission time interval
  • the eMBB data is already scheduled and transmitted
  • the generated URLLC data may be transmitted in the frequency band without transmitting a part of the eMBB data in the current frequency band.
  • a UE scheduled for eMBB data and a UE scheduled for URLLC data may be the same UE or different UEs. In this case, since a portion of the eMBB data that has already been scheduled and transmitted is not transmitted, the possibility that the eMBB data is damaged increases. Therefore, in such a case, a method for processing a signal received by a terminal scheduled for eMBB or a terminal scheduled for URLLC needs to be determined and a signal reception method.
  • the base station is a subject that performs resource allocation of the terminal, and may be at least one of an eNode B, a Node B, a base station (BS), a radio access unit, a base station controller, or a node on a network.
  • the terminal may include a user equipment (UE), a mobile station (MS), a cellular phone, a smart phone, a computer, or a multimedia system capable of performing a communication function.
  • a downlink (DL) is a wireless transmission path of a signal transmitted from a base station to a terminal
  • an uplink (UL) is a wireless transmission path of a signal transmitted from the terminal to a flag station.
  • LTE or LTE-A LTE or LTE-A system
  • 5G mobile communication technology 5G, new radio, NR
  • the embodiments of the present disclosure may be applied to other communication systems through some modifications within a range that does not significantly depart from the scope of the present disclosure as judged by a person having skilled technical knowledge.
  • an Orthogonal Frequency Division Multiplexing (OFDM) scheme is employed in a downlink (DL), and OFDM and SC-FDMA (Single Carrier Frequency Division) are adopted in an uplink (UL). Multiple Access) method is adopted.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division
  • the uplink refers to a radio link in which a terminal (terminal or user equipment, UE) or a mobile station (MS) transmits data or control signals to a base station (eNode B, or base station (BS)), and the downlink is a base station Refers to a radio link that transmits data or control signals to this terminal
  • a terminal terminal or user equipment, UE
  • MS mobile station
  • eNode B base station
  • BS base station
  • time-frequency resources for carrying data or control information for each user do not overlap each other, that is, orthogonality is By assigning and operating so as to be established, each user's data or control information can be distinguished.
  • the NR system employs a Hybrid Automatic Repeat reQuest (HARQ) method for retransmitting the corresponding data in the physical layer when a decoding failure occurs in the initial transmission.
  • HARQ Hybrid Automatic Repeat reQuest
  • the receiver when the receiver fails to correctly decode (decode) data, the receiver transmits information (Negative Acknowledgment; NACK) notifying the transmitter of decoding failure so that the transmitter can retransmit the data in the physical layer.
  • NACK Negative Acknowledgment
  • the receiver combines the data retransmitted by the transmitter with the previously unsuccessful data to improve data reception performance.
  • the transmitter may transmit new data by transmitting an acknowledgment (ACK) informing the transmitter of decoding success.
  • ACK acknowledgment
  • 1 is a diagram illustrating an uplink/downlink time-frequency domain transmission structure of an NR system.
  • the horizontal axis represents the time domain and the vertical axis represents the frequency domain.
  • the minimum transmission unit in the time domain is an OFDM to DFT-s-OFDM symbol, and N symb (101) OFDM to DFT-s-OFDM symbols are gathered to form one slot 102.
  • the OFDM symbol is a symbol for transmitting and receiving a signal using the OFDM multiplexing method
  • the DFT-s-OFDM symbol is a symbol for transmitting and receiving a signal using the DFT-s-OFDM or SC-FDMA multiplexing method.
  • the radio frame 104 is a time domain section consisting of 10 subframes.
  • the minimum transmission unit in the frequency domain is a subcarrier, and the bandwidth of the entire system transmission bandwidth consists of a total of N BW 105 subcarriers.
  • these specific numerical values may be variably applied.
  • the interval between subcarriers is 15 kHz, but two slots are gathered to form one subframe 103 , and in this case, the length of the slot is 0.5 ms and the length of the subframe is 1 ms.
  • a basic unit of a resource in the time-frequency domain is a resource element 106 (Resource Element; RE) and may be represented by an OFDM symbol index and a subcarrier index.
  • a resource block 107 (Resource Block; RB or Physical Resource Block; PRB) may be defined as N symb 101 consecutive OFDM symbols in the time domain and N SC RB 108 consecutive subcarriers in the frequency domain.
  • one RB 107 in one slot may include N symb ⁇ N SC RB REs.
  • the minimum allocation unit in the frequency domain of data is the RB 107 .
  • Downlink control information may be transmitted within the first N OFDM symbols in the subframe.
  • the base station varies the number of symbols in which downlink control information can be transmitted in the slot for each slot, and separates downlink control information about the number of symbols. It can be transmitted to the terminal through the channel.
  • scheduling information for downlink data or uplink data may be transmitted from the base station to the terminal through downlink control information (DCI).
  • DCI is defined according to various formats, and whether it is scheduling information for uplink data (UL grant) or scheduling information for downlink data (DL grant) according to each format, whether it is a compact DCI with a small size of control information , whether the control information is fall-back DCI, whether spatial multiplexing using multiple antennas is applied, whether DCI for power control, and the like.
  • the DCI format eg, DCI format 0_1 of NR
  • scheduling control information (UL grant) for uplink data may include at least one of the following control information.
  • ⁇ 1 bit if the UE monitors DCI format 0_1 having CRC scrambled with CS-RNTI and performs channel access in the shared spectrum.
  • bit value When the bit value is 0, it means activation of type 2 CG transmission, and when the bit value is 1, it means CG-DFI.
  • the UE receives DCI format 0_1 having a CRC scrambled with C-RNTI/SP-CSI-RNTI/MCS-C-RNTI, the corresponding bit may be reserved.
  • VRB-to-PRB mapping (virtual resource block-to-physical resource block mapping) - 0 or 1 bit, only for resource allocation type 1.
  • SRS resource indicator SRS resource indicator
  • CBG transmission information code block group transmission information
  • PTRS-DMRS association phase tracking reference signal-demodulation reference signal relationship
  • DCI is a downlink physical control channel PDCCH (Physical downlink control channel) (or control information, hereinafter to be used mixedly) or EPDCCH (Enhanced PDCCH) (or enhanced control information, hereinafter mixed use) through a channel coding and modulation process to be used)).
  • PDCCH Physical downlink control channel
  • EPDCCH Enhanced PDCCH
  • the field of DCI form 0_1 may include the following control information.
  • bitmap - 16 bits where the order of the bitmap to HARQ process index mapping is such that HARQ process indices are mapped in ascending order from MSB to LSB of the bitmap. For each bit of the bitmap, value 1 indicates ACK, and value 0 indicates NACK
  • DCI is scrambled with a specific Radio Network Temporary Identifier (RNTI) (or terminal identifier C-RNTI) independently for each UE, a cyclic redundancy check (CRC) is added, and after channel coding, each independent PDCCH configured and transmitted.
  • RNTI Radio Network Temporary Identifier
  • CRC cyclic redundancy check
  • the PDCCH is mapped and transmitted during the control channel transmission period.
  • the frequency domain mapping position of the PDCCH is determined by the identifier (ID) of each terminal, and may be transmitted over the entire system transmission band.
  • Downlink data may be transmitted on a Physical Downlink Shared Channel (PDSCH), which is a physical channel for downlink data transmission.
  • PDSCH Physical Downlink Shared Channel
  • the PDSCH may be transmitted after the control channel transmission period, and scheduling information such as a specific mapping position and a modulation method in the frequency domain is determined based on DCI transmitted through the PDCCH.
  • the base station notifies the terminal of the modulation scheme applied to the PDSCH to be transmitted and the size of the data to be transmitted (transport block size; TBS).
  • the MCS may consist of 5 bits or more or fewer bits.
  • the TBS corresponds to a size before channel coding for error correction is applied to data (transport block, TB) to be transmitted by the base station.
  • a transport block may include a Medium Access Control (MAC) header, a MAC control element (CE), one or more MAC Service Data Units (SDUs), and padding bits.
  • TB may indicate a data unit or MAC PDU (Protocol Data Unit) transmitted from the MAC layer to a physical layer.
  • Modulation schemes supported by the NR system are Quadrature Phase Shift Keying (QPSK), Quadrature Amplitude Modulation (16QAM), 64QAM, and 256QAM, and each modulation order (Qm) is 2, 4, and 6, respectively. That is, 2 bits per symbol for QPSK modulation, 4 bits per symbol for 16QAM modulation, 6 bits per symbol for 64QAM modulation, and 8 bits per symbol for 256QAM modulation may be transmitted. In addition, a modulation scheme of 256QAM or higher may be used according to system modification.
  • the uplink/downlink HARQ adopts an asynchronous HARQ scheme in which a data retransmission time point is not fixed.
  • the base station freely determines the transmission time of the retransmission data by a scheduling operation.
  • the UE may perform combining with data retransmitted from the base station after buffering data determined to be an error as a result of decoding received data for HARQ operation.
  • HARQ ACK/NACK information of the PDSCH transmitted in subframe n-k may be transmitted from the terminal to the base station through PUCCH or PUSCH in subframe n.
  • the k value may be transmitted by being included in DCI for instructing or scheduling reception of the PDSCH transmitted in the subframe nk, or the k value may be set to the terminal through a higher-order signal.
  • the base station may set one or more k values as higher-order signals and indicate a specific k value through DCI.
  • k may be determined according to the HARQ-ACK processing capability of the UE, that is, the minimum time required for the UE to receive the PDSCH and generate and report the HARQ-ACK for the PDSCH.
  • the terminal may use a predefined value or a default value before receiving the k value set.
  • one TB to be transmitted in uplink or downlink may have a CRC added to the last or first part.
  • the CRC may have 16 bits or 24 bits, a predetermined number of bits, or a variable number of bits according to channel conditions, and may be used to determine whether channel coding succeeds.
  • a block to which TB and CRC are added may be divided into several code blocks (CB).
  • a code block can be divided with a predetermined maximum size. In this case, the last code block can have a smaller size than other code blocks, or 0, a random value, or 1 can be added to match the length of other code blocks. .
  • CRCs may be added to each of the divided code blocks, and the CRC may have 16 bits or 24 bits or a predetermined number of bits, and may be used to determine whether channel coding succeeds.
  • the NR system may determine whether transmission succeeds or fails while performing decoding for each code block, rather than determining whether transmission succeeds or fails in units of TB in order to increase retransmission efficiency.
  • the decoding result of each code block is bundled in CBG units and ACK or NACK is transmitted.
  • the maximum CBG size is determined by the value set in the upper layer, and is equally applied to all HARQ process numbers.
  • higher signaling or higher signal is a signal transmission method from the base station to the terminal using the downlink data channel of the physical layer or from the terminal to the base station using the uplink data channel of the physical layer, RRC signaling , or PDCP signaling, or a signal transmission method transmitted through a MAC control element (MAC CE).
  • the higher-order signaling or the higher-order signal may include system information commonly transmitted to a plurality of terminals, for example, a system information block (SIB).
  • SIB system information block
  • a transmitting device that intends to transmit a signal through the unlicensed band performs a channel access procedure (Channel access) for the unlicensed band to perform communication before transmitting the signal.
  • procedure or LBT: listen-before talk
  • LBT listen-before talk
  • the channel access procedure in the unlicensed band is generally performed for a fixed time in the transmitter or a time calculated according to a predefined rule (eg, at least a time calculated through one random value selected by the base station or the terminal). Measure the strength of a signal received through the unlicensed band, and the magnitude of the received signal strength defined in advance or composed of at least one variable among the channel bandwidth, the bandwidth of the signal to be transmitted, and the strength of the transmission power It is possible to determine the idle state of the unlicensed band by comparing it with the threshold calculated by the determining function.
  • a predefined rule eg, at least a time calculated through one random value selected by the base station or the terminal.
  • the transmitting device measures the signal strength for Xus (eg, 25us) immediately before the time to transmit the signal, and the measured signal strength is a predefined or calculated threshold T (eg, - 72dBm), it is determined that the unlicensed band is in an idle state, and the set signal can be transmitted.
  • the maximum time for continuous signal transmission may be limited according to the maximum channel occupancy time defined for each country, region, and frequency band according to each unlicensed band, and the transmitting device It may also be limited according to the type (eg, a base station or a terminal, or a master device or a slave device). For example, in the case of Japan, in the 5 GHz unlicensed band, the base station or terminal occupies the channel without performing additional channel access procedure for up to 4 ms for the unlicensed band determined to be idle after performing the channel access procedure. have.
  • the channel access procedure that the base station or the terminal can perform can be described by dividing at least the following types.
  • Type 2 Transmission of uplink/downlink signals after performing the channel access procedure for a fixed time
  • a case in which a base station transmits a downlink signal to a terminal through an unlicensed band and a case in which the terminal transmits an uplink signal to a base station through an unlicensed band will be mixed and described.
  • the terminal transmits an uplink signal to the base station through the unlicensed band or when the base station transmits a downlink signal to the terminal through the unlicensed band, the same application or partial modification is applicable. Therefore, a detailed description of the downlink signal transmission and reception will be omitted.
  • it is assumed that one piece of downlink data information (codeword or TB) or uplink data information is transmitted/received between the base station and the terminal.
  • the content described in the present disclosure will be applicable even when the base station transmits a downlink signal to a plurality of terminals or transmits and receives a plurality of codewords or TBs between the base station and the terminal.
  • a transmitting node (hereinafter, a base station or a terminal) that intends to transmit a signal in an unlicensed band may determine a channel access procedure method according to a type of a signal to be transmitted. For example, when the base station intends to transmit a downlink signal including a downlink data channel in an unlicensed band, the base station may perform a Type 1 channel access procedure. And when the base station intends to transmit a downlink signal that does not include a downlink data channel in the unlicensed band, for example, a synchronization signal or a downlink control channel transmission, the base station performs a Type 2 channel access procedure and the downlink signal can be transmitted.
  • a base station or a terminal may determine a channel access procedure method according to a type of a signal to be transmitted. For example, when the base station intends to transmit a downlink signal including a downlink data channel in an unlicensed band, the base station may perform a Type 1 channel access procedure. And when the base station intends to transmit a downlink
  • the channel access procedure method may be determined according to the transmission length of a signal to be transmitted in the unlicensed band or the length of the time or section used by occupying the unlicensed band.
  • the Type 1 scheme may need to perform a channel access procedure for a longer time than that of the Type 2 scheme. Therefore, when a signal is to be transmitted for a short time period or a time less than a reference time (eg, Xms or Y symbols), a Type 2 channel access procedure may be performed.
  • a Type 1 channel access procedure may be performed when a signal is to be transmitted over a long time interval or a reference time (eg, Xms or Y symbols) or longer. In other words, different types of channel access procedures may be performed according to the usage time of the unlicensed band.
  • the channel access procedure may be performed using at least one or more values among predefined set values as shown in Table 1.
  • QCI 1, 2, and 4 mean QCI values for services such as Conversational Voice, Conversational Video (Live Streaming), and Non-Conversational Video (Buffered Streaming), respectively. If it is desired to transmit a signal for a service that does not match the QCI of Table 1 to the unlicensed band, a QCI closest to the service and the QCI of Table 1 may be selected, and a channel access priority type may be selected.
  • Table 1 shows the mapping relationship between Channel Access Priority Classes and QCI.
  • a set (CW_p) of a delay duration, a contention window value or size according to the determined channel access priority (p), and the minimum and maximum values of the contention period (CW_min,p, CW_max,p), the maximum channel occupancy period (T_mcot,p), etc. can be determined through [Table 2].
  • N is selected as an arbitrary integer value between 0 and the value (CW_p) of the contention period at the time of performing the channel access procedure.
  • the minimum contention period value and the maximum contention period value are 15 and 63, respectively. If it is determined that the unlicensed band is in an idle state in the delay period and the additional channel access procedure performing period, the base station may transmit a signal through the unlicensed band for T_mcot,p time (8 ms).
  • [Table 2] is a table showing a channel access priority class (Channel access priority class) in the downlink.
  • the downlink channel access priority class will be used for description, but in the case of uplink, the channel access priority class of [Table 2] is reused, or the channel access priority class for uplink transmission can be defined and used.
  • the initial contention period value (CW_p) is the minimum value (CW_min,p) of the contention period.
  • the value of the contention period (CW_p) is, at the time when the base station (or terminal) starts the channel access procedure, or at the time when the base station (or terminal) selects the N value to perform the channel access procedure, or immediately before the base station (or terminal) among the downlink (or uplink) signal transmission period (or MCOT) most recently transmitted through the unlicensed band, a reference subframe (reference subframe) or a reference duration (reference duration) or a reference slot (reference) slot) may be changed based on a reception result for a downlink (or uplink) data channel.
  • the base station reports and receives the reception result of the terminal for downlink (or uplink) data transmitted in the reference subframe or reference interval or reference slot, and among the reported reception results, the ratio of NACK (Z ) or the number of ACKs (to ratio), the size of CW_p may be increased or minimized.
  • the initial contention period value (CW_p) is the minimum value (CW_min,p) of the contention period.
  • the value of the contention period (CW_p) is, at the time when the base station (or terminal) starts the channel access procedure, or at the time when the base station (or terminal) selects the N value to perform the channel access procedure, or immediately before the base station (or terminal) among the downlink (or uplink) signal transmission period (or MCOT) most recently transmitted through the unlicensed band, a reference subframe (reference subframe) or a reference duration (reference duration) or a reference slot (reference) slot) may be changed based on a reception result for a downlink (or uplink) data channel.
  • the base station reports and receives the reception result of the terminal for downlink (or uplink) data transmitted in the reference subframe or reference interval or reference slot, and among the reported reception results, the ratio of NACK (Z ) or the number of ACKs (to ratio), the size of CW_p may be increased or minimized.
  • FIG. 2 is a diagram for explaining a channel access procedure in an unlicensed band.
  • the first transmission period 240 of the downlink signal transmission period 230 transmitted to becomes a contention period change reference slot for the channel access procedure 270 . If the base station cannot report and receive the reception result for the downlink data channel transmitted in the first slot 240 of the transmission period 230, for example, the first slot and the base station initiate a channel access procedure.
  • the base station starts the channel access procedure before the time when the terminal can report the downlink data channel reception result for the first slot 240 .
  • the first subframe of the most recent downlink signal transmission period transmitted before the downlink signal transmission period 230 becomes the reference subframe.
  • the base station may determine the first slot of the most recently transmitted downlink signal transmission interval among the reception results for the downlink data channel previously received from the terminals as the reference slot. have.
  • the base station determines the contention interval size used in the channel access procedure 270 by using the downlink data reception result received from the terminals with respect to the downlink data transmitted through the downlink data channel in the reference slot. can judge
  • the base station determines the value of the contention interval It can be maintained as the original value or changed to the initial value of the contention section. If, during CBG-based transmission of the base station, when it is determined that CBG of 10% or more among the reception results of the terminal is ACK, the base station may change the value of the contention period to an initial value. In this case, the change of the contention period may be commonly applied to all channel access priority types or may be applied only to the channel access priority types used in the channel access procedure.
  • the A method of determining an effective reception result for determining a contention section size change that is, a method of determining a Z value, is as follows.
  • the base station transmits one or more codewords or TBs to one or more terminals in the reference subframe or reference slot, the base station transmits or reports the TB received in the reference subframe or reference slot.
  • the base station may determine that the terminal has transmitted M reception results.
  • the base station may determine the Z value as a ratio of NACK among the M reception results, and may change, maintain, or initialize the contention interval size.
  • the reference subframe is a reception result for the second slot among two slots constituting one subframe
  • the reference subframe that is, the second slot
  • the Z value may be determined by the ratio of NACK among the reception results transmitted or reported by the terminal to the base station.
  • the terminal may use the reference subframe or reference
  • the base station may determine the Z value by determining the reception result of the terminal as NACK.
  • the base station may not include the reception result of the terminal in the reference value Z of the contention interval variation. In other words, the base station may ignore the reception result of the terminal and determine the Z value.
  • the base station when the base station transmits scheduling information or downlink control information for a downlink data channel through a licensed band, among the downlink data reception results for a reference subframe or a reference slot transmitted or reported by the terminal to the base station , when the base station does not actually transmit downlink data (no transmission), the base station may determine the Z value by ignoring the reception result transmitted or reported by the terminal for the downlink data.
  • each service has a different subcarrier interval according to a requirement. It can be determined using Equation 1 below as a method of supporting a plurality of subcarrier intervals in the current 5G communication system.
  • f 0 represents the basic subcarrier spacing of the system
  • m represents an integer scaling factor.
  • a set of subcarrier spacing that the 5G communication system can have may be configured with 3.75 kHz, 7.5 kHz, 15 kHz, 30 kHz, 60 kHz, 120 kHz, 240 kHz, 480 kHz, and the like.
  • a set of available subcarrier intervals may be different according to a frequency band.
  • a frequency band of 6 GHz or less 3.75 kHz, 7.5 kHz, 15 kHz, 30 kHz, and 60 kHz may be used, and in a frequency band of 6 GHz or more, 60 kHz, 120 kHz, and 240 kHz may be used.
  • the length of the OFDM symbol may vary according to the subcarrier interval constituting the OFDM symbol. This is because, as a characteristic of the OFDM symbol, the subcarrier interval and the length of the OFDM symbol have an inverse relationship with each other. For example, when the subcarrier spacing is doubled, the symbol length is shortened by 1/2, and conversely, when the subcarrier spacing is reduced by 1/2, the symbol length is doubled.
  • FIG. 3 is a diagram illustrating a downlink to uplink scheduling method and a resource region in an NR system.
  • the UE monitors or searches for the PDCCH 310 in a downlink control channel (hereinafter, a control resource set (CORESET) to a search space (SS)) configured through an upper signal from the base station.
  • PDCCH downlink control channel
  • the downlink control channel domain is composed of time domain 314 and frequency domain 312 information, and time domain 314 information is set in units of symbols, and frequency domain 312 information is set in units of RBs or groups of RBs. have.
  • DCI downlink control information
  • the terminal may obtain scheduling information for a downlink data channel or an uplink data channel.
  • the DCI at least the resource region (or PDSCH transmission region) information in which the UE needs to receive the downlink data channel (hereinafter, PDSCH) transmitted from the base station, or the UE is allocated from the base station for uplink data channel (PUSCH) transmission.
  • Resource area information may be included.
  • the UE may obtain a slot index or offset information (K) for receiving a PUSCH through DCI, and may determine a PUSCH transmission slot index.
  • the UE can determine that it is scheduled to transmit the PUSCH in the slot i+K 305 through the received offset information K based on the slot index i 300 at which the PDCCH 310 is received. have. At this time, the UE can also determine the PUSCH start symbol or time in the slot i+K 305 or the slot i+K through the received offset information K based on the CORESET received the PDCCH 310 . . In addition, the UE may obtain information about the PUSCH transmission time-frequency resource region 340 in the PUSCH transmission slot 305 in the DCI. In this case, the PUSCH transmission frequency resource region information 330 may be group unit information of PRB to PRB.
  • the PUSCH transmission frequency resource region information 330 is included in the initial uplink bandwidth (initial BW, BandWidth) or the initial uplink bandwidth part (initial BWP, BandWidth Part) determined or set by the terminal through the initial access procedure. is the area If the terminal receives an uplink bandwidth (BW, BandWidth) or an uplink bandwidth part (BWP, BandWidth Part) through a higher-order signal, the PUSCH transmission frequency resource region information 330 is set through an upper-order signal. This is an area included in the uplink bandwidth (BW, BandWidth) or the uplink bandwidth part (BWP, BandWidth Part).
  • the PUSCH transmission time resource region information 325 may be information in units of symbols or groups of symbols, or information indicating absolute time information.
  • the PUSCH transmission time resource region information 325 may be expressed as a combination of a PUSCH transmission start time or symbol and a PUSCH length, or a PUSCH end time or a symbol, and may be included in DCI as one field or value.
  • the PUSCH transmission time resource region information 325 may be included in DCI as a PUSCH transmission start time or symbol and a length of a PUSCH or a PUSCH end time or a field or a value representing each symbol.
  • the UE may transmit the PUSCH in the PUSCH transmission resource region 340 determined through the DCI.
  • an uplink signal may be transmitted without uplink scheduling information in order to provide various services and support a high data rate. More specifically, when an uplink signal is transmitted without uplink scheduling information, information such as resource allocation and MCS for uplink transmission may be set through RRC signaling or DCI of PDCCH, and the uplink transmission that can be performed is According to the uplink transmission configuration reception method, at least the following types can be divided and described.
  • FIG. 4 is a diagram illustrating a downlink to uplink scheduling method and a resource region in an NR system.
  • an uplink signal is transmitted without uplink scheduling information in an unlicensed band.
  • a channel access procedure is performed to transmit an uplink signal without uplink scheduling information.
  • the terminal uses the channel occupancy time sharing indicator of the uplink control information 405 to the last slot 404 within the maximum channel occupancy time 412 or Downlink transmission may be scheduled for the last subframe 404 .
  • the base station determines channel access by performing a channel access procedure for a fixed time, and the terminal empties the last one symbol of the slot 408 or subframe 408 for uplink transmission for the channel access procedure of the base station. Set as gap section.
  • Downlink transmission is limited to the PDCCH 409 as shown in FIG. 4, and the start symbol of the PDCCH 409 is limited to the first symbol of the last slot 404 or the last subframe 404, and a symbol length within two have
  • the base station may transmit the decoding result of the received uplink signal to the terminal using a bitmap of DCI format 0_1 (CG-DFI).
  • the base station may transmit ACK/NACK information for all HARQ process numbers in a bitmap.
  • the base station may indicate ACK/NACK feedback for transmission corresponding to each HARQ process number with 1 bit.
  • the HARQ process number that has not been transmitted so far or is empty may be set to a default value (NACK or ACK).
  • the UE may change (or adjust) the contention period value described above by using the ACK/NACK information included in the bitmap.
  • the base station may configure uplink signal transmission by dividing one TB (or PUSCH) by CBG when transmitting the uplink signal of the terminal in the upper configuration.
  • the base station may receive one or more CBGs in one uplink signal (PUSCH or TB).
  • the base station transmits feedback information on one or more CBGs transmitted in each HARQ process (or uplink signal) to the terminal as a bitmap of CG-DFI, it may inform the reception result with 1-bit information. Therefore, when the base station receives one or more CBGs, it is necessary to describe a method of constructing a bitmap of CG-DFI by converting each reception result into 1-bit information.
  • the method of the base station configuring the bitmap of the CG-DFI and the terminal are A method of determining and interpreting a bitmap of a CG-DFI received by a base station will be described.
  • the method and apparatus described in the embodiments of the present disclosure are not limited to and applied to each embodiment, and a bitmap transmission method of HARQ-ACK feedback using a combination of all or some embodiments of one or more embodiments of the present disclosure and It will be possible to utilize the device.
  • a case of transmitting HARQ-ACK feedback for an uplink signal will be described as an example, but it will be applicable even when the terminal performs HARQ-ACK feedback transmission for a downlink signal.
  • an embodiment of the present disclosure will be described assuming a base station and a terminal operating in an unlicensed band. In addition to the unlicensed band, the method and apparatus proposed in the embodiment of the present invention may be applied to a base station and a terminal operating in a licensed band or a shared spectrum.
  • a method for the base station to indicate ACK/NACK transmission information for all HARQ processes using a bitmap and a method for determining the ACK/NACK information received by the terminal explained.
  • the terminal In the base station and the terminal transmitting and receiving signals in the unlicensed band, it is assumed that the terminal is configured to perform PUCCH / PUSCH transmission in one or more slots with a configured grant setting. In addition, the terminal can transmit PUCCH / PUSCH in one or more slots with the grant configuration configured from the base station.
  • the terminal Upon receiving the configured grant transmission from the base station, the terminal may transmit the PUSCH including the HARQ process number in the uplink control signal.
  • the HARQ process number used for the configured grant transmission may be allocated from the base station, and may also be used for grant (scheduling)-based uplink transmission.
  • the base station may configure CBG-based uplink transmission to the terminal.
  • the base station may determine whether transmission succeeds or fails while performing decoding for each code block.
  • the base station configures the bitmap configuration method of CG-DFI on a TB-based basis indicating HARQ-ACK feedback with 1-bit information for each HARQ process or CBG-based indicating HARQ-ACK feedback for one or more CBGs for each HARQ process. It is also possible to set whether to operate by L1 or higher signaling (eg, SIB, MIB, MAC-CE, RRC signaling).
  • FIG. 5 is a diagram illustrating an embodiment of the present disclosure.
  • the base station may receive a CBG-based uplink signal (PUSCH or TB) from the terminal. Also, the base station may decode the received CBG-based uplink signal in units of CBGs. When the base station generates the HARQ-ACK information bit for the corresponding uplink signal (or HARQ process number), it may reconfigure (or change) the decoding result of the CBG.
  • the base station decodes at least one CBG constituting the uplink signal (TB or PUSCH, 511) received from the terminal, and determines that at least one CBG is NACK, the base station transmits the corresponding uplink signal (or A bitmap of CG-DFI may be configured by generating the HARQ-ACK information bit for the HARQ process number 511 as NACK (or 0 to 1, 515).
  • the base station decodes one or more CBGs constituting the uplink signal (TB or PUSCH, 512) received from the terminal and determines that all of them are ACK, the base station transmits the corresponding uplink signal (or HARQ process number).
  • a bitmap of the CG-DFI may be configured by generating the HARQ-ACK information bit for the NACK (or 1 to 0, 516).
  • the UE receiving the bitmap of the CG-DFI configured in the above manner may adjust the contention window value by using bit information of the bitmap of the CG-DFI.
  • a method for the UE to determine the bitmap information of the CG-DFI in order to adjust the contention interval value will be described.
  • the UE may determine that each bit information of the bitmap means TB-based ACK/NACK information. More specifically, the UE receives one or more bit information about one or more uplink signals (PUSCH to TB, 511, 512) transmitted in the reference slot (to period, 500) among the bitmap information included in the received CG-DFI. Based on (515, 516), the contention interval value may be adjusted (or changed or set).
  • the terminal adjusts (or changes or sets) the contention period value to the initial value (or minimum value) or the current contention period value can be kept.
  • the terminal is a contention interval value can be increased to the next contention interval value.
  • the UE may retransmit. In this case, the UE may not perform retransmission on a grant (or scheduling) based uplink signal.
  • the UE may determine that each bit of the bitmap means CBG-based ACK/NACK information. More specifically, the UE receives one or more bit information about one or more uplink signals (PUSCH to TB, 511, 512) transmitted in the reference slot (to period, 500) among the bitmap information included in the received CG-DFI. (515, 516) may be converted into CBG-based ACK/NACK information, respectively, to determine (or change or set) the contention interval value.
  • PUSCH to TB, 511, 512 uplink signals
  • the reference slot to period, 500
  • the UE may adjust (or change or set) the contention interval value based on the ACK/NACK ratio of the CBG unit. If at least 10% of the converted CBG-based ACK / NACK information is ACK, the UE adjusts (or changes or sets) the contention period value to the initial value (or minimum value) or maintains the current contention period value. .
  • the UE may increase the contention period value to the next contention period value.
  • the UE may retransmit the corresponding uplink signal. In this case, the UE may not perform retransmission on a grant (or scheduling) based uplink signal. According to embodiment 1-2, there is an advantage of increasing the probability of minimizing the contention interval value of the terminal.
  • the base station may be able to set the operation according to the above embodiment by L1 or higher level signaling.
  • it may be possible to adjust the contention interval value by a combination of the above embodiments.
  • the determination of the HARQ information bit for the uplink signal transmitted in the reference slot (to section) applies Example 1-2, and the determination of the HARQ information bit for the uplink signal other than the example 1- It would also be possible to apply 1.
  • a method for the base station to indicate ACK/NACK transmission information for all HARQ processes using a bitmap and a method for determining the ACK/NACK information received by the terminal explained.
  • the terminal In the base station and the terminal transmitting and receiving signals in the unlicensed band, it is assumed that the terminal is configured to perform PUCCH / PUSCH transmission in one or more slots with a configured grant setting. In addition, the terminal may transmit PUCCH / PUSCH in at least one slot with a grant configuration configured from the base station. Upon receiving the configured grant transmission from the base station, the terminal may transmit the PUSCH including the HARQ process number in the uplink control signal. In this case, the HARQ process number used for the configured grant transmission may be allocated from the base station, and may also be used for grant (scheduling)-based transmission. Meanwhile, the base station may configure CBG-based uplink transmission to the terminal.
  • the base station may determine whether transmission succeeds or fails while performing decoding for each code block. In addition, the base station determines whether the DFI bitmap configuration method is TB-based indicating HARQ-ACK feedback by 1 bit for each HARQ process or CBG-based indicating HARQ-ACK feedback for one or more CBGs for each HARQ process L1 Alternatively, it may be configured with higher level signaling (eg, SIB, MIB, MAC-CE, RRC signaling).
  • higher level signaling eg, SIB, MIB, MAC-CE, RRC signaling
  • FIG. 6 is a diagram illustrating another embodiment of the present disclosure.
  • the base station sets the size of the CBG to 2 through higher signaling.
  • the base station may receive a CBG-based uplink signal (PUSCH or TB) from the terminal. Also, the base station may decode the received CBG-based uplink signal in units of CBGs. When the base station generates the HARQ-ACK information bit for the corresponding uplink signal (or HARQ process number), the base station may determine the method of adjusting the contention interval value of the terminal based on the CBG decoding result.
  • PUSCH CBG-based uplink signal
  • TB CBG-based uplink signal
  • the base station adjusts (or changes or sets) the contention period value to the initial value (or minimum value) or the current contention period value. can be expected to keep.
  • the base station can expect that the UE increases the contention interval value to the next contention interval value.
  • the base station may generate a feedback information bit for the corresponding uplink signal (or HARQ process number) in consideration of the method of adjusting the contention interval value of the terminal.
  • the base station may generate all of the HARQ-ACK information bits for one or more uplink signals 611 and 612 received in the reference slot (or interval, 600) as ACKs (or 1 to 0).
  • the base station when the base station decodes one or more uplink signals 611 and 612 received in the reference slot (or section, 600) and intends to indicate an increase in the contention section value of the terminal, the base station uses the reference slot ( Alternatively, all of the HARQ-ACK information bits for one or more uplink signals 611 and 612 received within the interval 600 may be generated as NACK (or 0 to 1).
  • a specific bit combination as L1 or higher-order signaling, or configure a preset bit combination to indicate a method of adjusting the contention interval value of the terminal.
  • the size of the specific bit may be the same as the number of uplink signals transmitted in the reference slot (or section).
  • the UE may adjust the contention interval value of the UE by using bit information corresponding to the reference slot (to interval) among the bits of the received bitmap of the CG-DFI. In this case, the UE may not perform retransmission based on bit information (or information on increasing the contention interval value of the UE) corresponding to the reference slot (or interval).
  • the method for the base station to generate the HARQ-ACK information bit for the uplink signal transmitted in the reference slot (or interval) has been described, but it may be applied to all slots. Alternatively, it will be possible to apply only to grant-based uplink transmission or only to a configured grant-based uplink transmission signal.
  • the terminal In the base station and the terminal transmitting and receiving signals in the unlicensed band, it is assumed that the terminal is configured to perform PUCCH / PUSCH transmission in one or more slots with a configured grant setting.
  • the terminal may transmit PUCCH / PUSCH in at least one slot with a grant configuration configured from the base station.
  • the terminal Upon receiving the configured grant transmission from the base station, the terminal may transmit the PUSCH including the HARQ process number in the uplink control signal.
  • the HARQ process number used for the configured grant transmission may be allocated from the base station, and may also be used for grant (scheduling)-based transmission.
  • the base station may configure CBG-based uplink transmission to the terminal. When decoding a CBG-based uplink signal, the base station may determine whether transmission succeeds or fails while performing decoding for each code block.
  • FIG. 7 is a diagram illustrating another embodiment of the present disclosure.
  • the base station sets the size of CBG to 2 through higher signaling.
  • the base station may configure the feedback for the uplink signal of the terminal as a bitmap and transmit the CG-DFI 707 to the terminal.
  • the terminal may perform contention interval value adjustment of the terminal based on bitmap information of CG-DFI received from the base station.
  • the base station may transmit a UL grant DCI 708 indicating retransmission or initial transmission of the uplink of the terminal, and the UL grant DCI includes an ACK in TB or CBG units. /NACK information may be included.
  • the terminal receives the UL grant DCI 708 from the base station after the terminal increases the contention interval value by using the information included in the CG-DFI 707 .
  • the HARQ process used for the UE to adjust the contention interval value of the UE based on the CG-DFI 707 bitmap information or ACK/NACK information for uplink transmission is assumed to be included. If the ACK/NACK information (or contention interval value adjustment information) received by the UE from the CG-DFI 707 is the same as the ACK/NACK information received from the UL grant DCI 708, the UE uses the CG-DFI 707 ) may not change the contention interval value of the terminal determined based on the.
  • the UE competes in the following way You can adjust the interval value.
  • the UE may maintain the contention interval value adjusted by using the previously received information included in the CG-DFI 707 .
  • the ACK/NACK information included in the UL grant DCI 708 may not be used for adjusting the contention interval value of the UE.
  • the UE may change the contention interval value adjusted using the previously received information included in the CG-DFI 707 based on the ACK/NACK information included in the UL grant DCI 708 . For example, after the UE increases the contention interval value using the information included in the CG-DFI 707, the ACK/NACK information included in the UL grant DCI 708 received by the UE indicates the contention interval value of the UE. If the adjustment to the initial value (or minimum value) means, the terminal may adjust the contention interval value of the terminal to the initial value (or minimum value).
  • the UL grant DCI 708 received by the UE includes If the ACK/NACK information means an increase in the contention interval value of the UE, the UE may increase the contention interval value of the UE. At this time, the terminal increases based on the contention interval value before the CG-DFI 707 reception or increases the contention interval value adjusted to the initial value (or minimum value) after receiving the CG-DFI 708 based on the increase. possible.
  • the ACK/NACK information included in the UL grant (DCI) received by the UE is the contention interval of the UE. If it means to increase the value, the terminal may increase the contention interval value of the terminal to the next value.
  • the UE wants to change the contention interval value adjusted using the information included in the previously received CG-DFI 716 based on the ACK/NACK information included in the UL grant DCI 724, if the UL grant DCI ( 724)
  • the ACK/NACK information included in the UL grant DCI is transmitted to the terminal. It may not be used to adjust the contention section value.
  • Retransmission for one or more uplink signal transmissions 714 and 715 transmitted in the reference slot (or interval, 709) in the UL grant DCI 725 before the UE receives the CG-DFI 726.
  • the UE may adjust the contention interval value based on the UL grant DCI 725 .
  • the ACK/NACK information (or contention interval adjustment information) received in the DFI may not be used or may not be expected to be received.
  • the terminal in the base station and the terminal transmitting and receiving signals in the unlicensed band, it is assumed that the terminal is configured to perform PUSCH transmission in one or more slots (or symbols) with a configured grant setting.
  • the terminal may transmit the PUSCH including the HARQ process number in the uplink control signal.
  • the HARQ process number used for the configured grant transmission may be allocated from the base station, and may also be used for grant (scheduling)-based transmission.
  • the base station may configure the terminal with higher (or indicated by L1 to DCI) signaling so that the terminal transmits an uplink signal based on CBG.
  • the base station may determine whether transmission succeeds or fails while performing decoding for each code block. In this case, the terminal may determine that the CBG-based uplink signal transmission configured as higher (or L1) signaling from the base station corresponds only to the uplink signal transmission scheduled by DCI. In other words, the terminal may not perform CBG-based uplink signal transmission for uplink transmission based on the configured grant of the unlicensed band. As another method, in the unlicensed band, the base station may not configure CBG-based uplink signal transmission to the terminal by higher (or L1) signaling to the terminal. In other words, the terminal may not expect the CBG-based uplink signal transmission configuration from the base station in the unlicensed band.
  • the terminal grants the uplink configured based on the bit information of the DFI (or schedule) uplink) retransmission may not be performed.
  • the UE may use the bit information of the DFI only to adjust the contention interval value of the UE. For example, even if the DFI feedback for a specific HARQ process number indicates NACK, retransmission is not performed and only the contention interval value may be increased.
  • FIG. 8 is a flowchart illustrating an operation of a base station according to an embodiment of the present disclosure.
  • the base station may transmit the PDCCH, PDSCH, PUCCH, and PUSCH transmission/reception settings to the terminal through a higher-order signal.
  • the PDCCH resource region for receiving downlink or uplink scheduling information, CORESET setting, search space setting, etc. may be transmitted to the UE through a higher-order signal.
  • the base station may transmit the configuration related to the PDSCH/PUSCH transmission and reception, including offset information between the PDCCH reception slot and the PDSCH reception slot or the PUSCH transmission slot, information on the number of times of repeated PDSCH or PUSCH transmission, and the like, to the terminal through a higher-order signal.
  • the base station may transmit configuration information for scheduling multiple PUSCHs with one DCI, interlace structure configuration, and configuration related to subcarrier interval information used for downlink reception or uplink transmission to the terminal through a higher-order signal.
  • the base station may additionally transmit configuration information related to the configured grant, such as the configured grant transmission period and offset information.
  • configuration information related to a CBG size for CBG-based uplink transmission may be transmitted.
  • the configured grant configuration information and CBG-based uplink configuration information transmitted to the terminal in step 810 may be transmitted in step 800 .
  • the base station may additionally set setting information for a method of configuring a bitmap of the DFI, and may be omitted if related setting information is previously set.
  • the base station may configure a bitmap of DFI based on TB-based ACK/NACK information in step 840. If, in step 830, the terminal transmits an uplink signal based on CBG, the base station DFI bitmap for setting the contention interval value adjustment of the terminal based on the DFI bitmap configuration method set for the terminal in step 820 in step 850 can be configured and transmitted to the terminal.
  • FIG. 9 is a flowchart illustrating an operation of a terminal according to an embodiment of the present disclosure.
  • the UE receives the PDCCH, PDSCH, PUCCH, PUSCH transmission/reception configuration from the base station through a higher-order signal, and configures the PDCCH, PDSCH, PUCCH, and PUSCH transmission/reception configuration according to the received configuration information.
  • the terminal may receive the PDCCH resource region for receiving downlink or uplink scheduling information from the base station, CORESET configuration, search space configuration, and the like, through a higher-order signal.
  • the UE can receive configuration information for scheduling multiple PUSCHs with one DCI, interlace structure configuration, and configuration related to subcarrier interval information used in downlink reception or uplink transmission from the base station through a higher-order signal. .
  • the terminal may receive additional configuration information related to the configured grant, such as the configured grant transmission period and offset information.
  • configuration information related to a CBG size for CBG-based uplink transmission may be additionally configured.
  • the terminal may additionally receive setting information on a method for configuring the bitmap of the DFI by the base station, and may be omitted when the related setting information is preset.
  • the terminal may determine that the DFI bitmap received from the base station in step 940 means ACK/NACK in TB units. If the terminal transmits an uplink signal based on CBG in step 930, the terminal determines that the DFI bitmap received from the base station in step 950 is a DFI bitmap determination method set in step 920 or a DFI bit based on a preset method It is possible to determine the map and adjust the contention interval value of the terminal.
  • a system for transmitting and receiving a signal based on Codeblock group transmission information (CBG) through an unlicensed band and a feedback bit information for a signal received from a node are used for the purpose of feedback
  • CBG Codeblock group transmission information
  • FIG. 10 is a block diagram illustrating a structure of a base station according to an embodiment of the present disclosure.
  • a base station may include a base station receiving unit 1000 , a base station transmitting unit 1010 , and a base station processing unit 1020 .
  • the base station receiving unit 1000 and the base station transmitting unit 1010 may be collectively referred to as a transceiver.
  • the transceiver may transmit/receive a signal to/from the terminal.
  • the signal may include control information and data.
  • the transceiver may include an RF transmitter for up-converting and amplifying a frequency of a transmitted signal, and an RF receiver for low-noise amplifying and down-converting a received signal.
  • the transceiver may receive a signal through a wireless channel and output it to the base station processing unit 1020 , and transmit the signal output from the terminal processing unit 1020 through the wireless channel.
  • the base station processing unit 1020 may control a series of processes so that the base station can operate according to the above-described embodiment of the present invention.
  • the base station receiving unit 1000 may receive a data signal including a control signal transmitted by the terminal, and the base station processing unit 1020 may determine a reception result of the control signal and the data signal transmitted by the terminal.
  • the base station processing unit 1020 may perform a channel access procedure for the unlicensed band.
  • the base station receiving unit 1020 receives the signals transmitted in the unlicensed band, and the base station processing unit 1020 pre-defined the strength of the received signal, or a value of a function using the bandwidth as a factor The determined threshold It can be compared with the value to determine whether the idle state of the unlicensed band.
  • the base station processing unit 1020 may configure or change DCI information for instructing the base station to release or activate Type 2 CG-PUSCH scheduling.
  • the base station processing unit 1020 controls the downlink control of the base station and the data channel transmission time Alternatively, the period may be reset or changed, and accordingly, the base station transmitter 1010 may transmit downlink control and data channels.
  • the base station processing unit 1020 may generate a bitmap of the DFI based on the data signal reception result of the terminal received by the base station receiving unit 1000 . In this case, the base station transmitter 1010 may transmit the DFI generated by the base station processor 1020 to the terminal.
  • FIG. 11 is a block diagram illustrating a structure of a terminal according to an embodiment of the present disclosure.
  • the terminal may include a terminal receiving unit 1100 , a terminal transmitting unit 1110 , and a terminal processing unit 1120 .
  • the terminal receiving unit 1100 and the terminal collectively refer to the transmitting unit 1110 as a transceiver.
  • the transceiver may transmit/receive a signal to/from the base station.
  • the signal may include control information and data.
  • the transceiver may include an RF transmitter for up-converting and amplifying a frequency of a transmitted signal, and an RF receiver for low-noise amplifying and down-converting a received signal.
  • the transceiver may receive a signal through a wireless channel and output it to the terminal processing unit 1120 , and transmit the signal output from the terminal processing unit 1120 through the wireless channel.
  • the terminal processing unit 1120 may control a series of processes so that the terminal can operate according to the above-described embodiment of the present invention.
  • the terminal receiving unit 1100 may receive a data signal including a control signal, and the terminal processing unit 1120 may determine a reception result of the data signal. Thereafter, when the first signal reception result including the data reception is to be transmitted to the base station at the timing, the terminal transmitter 1110 transmits the first signal reception result to the base station at the timing determined by the processing unit.
  • the terminal processing unit 1120 transmits the terminal's downlink control channel
  • the time or period may be reset or changed, or the terminal resets or changes time domain allocation information of a scheduled uplink data channel, and accordingly, the terminal receiver 1100 may receive a downlink control channel transmitted by the base station.
  • the terminal receives the reception result of the uplink data transmitted from the terminal transmitter 1100 from the base station in the reception unit 1100, and the terminal processing unit 1120 receives the received result according to the received result.
  • a channel for transmitting the unlicensed band signal The size of the contention section used in the access procedure can be maintained or changed.
  • the terminal receives DFI-related information and DFI transmitted by the base station from the receiving unit 1100, and the terminal processing unit 1120 determines a bitmap of the DFI based on the received DFI determination information or preset DFI determination information. In addition, the terminal may adjust the contention interval value of the terminal based on the bitmap information of the DFI determined by the processing unit 1120 .
  • a computer-readable storage medium storing one or more programs (software modules) may be provided.
  • One or more programs stored in the computer-readable storage medium are configured to be executable by one or more processors in an electronic device (device).
  • One or more programs include instructions for causing an electronic device to execute methods according to embodiments described in a claim or specification of the present disclosure.
  • Such programs include random access memory, non-volatile memory including flash memory, read only memory (ROM), electrically erasable programmable ROM (EEPROM: Electrically Erasable Programmable Read Only Memory), magnetic disc storage device, Compact Disc-ROM (CD-ROM), Digital Versatile Discs (DVDs), or any other form of It may be stored in an optical storage device or a magnetic cassette. Alternatively, it may be stored in a memory composed of a combination of some or all thereof. In addition, each configuration memory may be included in plurality.
  • the program accesses through a communication network composed of a communication network such as the Internet, Intranet, Local Area Network (LAN), Wide LAN (WLAN), or Storage Area Network (SAN), or a combination thereof. It may be stored in an attachable storage device that can be accessed. Such a storage device may be connected to a device implementing an embodiment of the present disclosure through an external port. In addition, a separate storage device on the communication network may be connected to the device implementing the embodiment of the present disclosure.
  • a communication network such as the Internet, Intranet, Local Area Network (LAN), Wide LAN (WLAN), or Storage Area Network (SAN), or a combination thereof. It may be stored in an attachable storage device that can be accessed.
  • Such a storage device may be connected to a device implementing an embodiment of the present disclosure through an external port.
  • a separate storage device on the communication network may be connected to the device implementing the embodiment of the present disclosure.
  • each embodiment may be operated in combination with each other as needed.
  • the base station and the terminal may be operated by combining parts of one embodiment and another embodiment of the present disclosure with each other.
  • other modifications based on the technical idea of the above embodiments may be implemented in various systems such as FDD LTE system, TDD LTE system, 5G or NR system.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention peut concerner un terminal effectuant une transmission et une réception de données dans un système de communication sans fil. Le terminal : reçoit, en provenance d'une station de base, des premières informations de configuration pour une transmission de liaison montante basée sur un groupe de blocs de code (CBG) et des secondes informations de configuration comprenant un procédé de configuration de table de bits d'informations de rétroaction de liaison descendante (DFI) ; transmet un signal de liaison montante basé sur des CBG à la station de base sur la base des premières informations de configuration ; reçoit, en provenance de la station de base, des DFI comprenant des informations de rétroaction concernant le signal de liaison montante basé sur des CBG sur la base des secondes informations de configuration ; et détermine une valeur d'intervalle de contention du terminal sur la base des informations de rétroaction comprises dans les DFI reçues, le procédé de configuration de table de bits de DFI indiquant si la rétroaction est une rétroaction dans des unités de blocs de transport (TB) ou une rétroaction pour un ou plusieurs CBG.
PCT/KR2021/001836 2020-02-14 2021-02-10 Procédé et appareil de rétroaction de harq-ack dans un système de communication sans fil WO2021162480A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN202180014448.7A CN115104271A (zh) 2020-02-14 2021-02-10 无线通信系统中用于反馈harq-ack的方法和装置
EP23174327.9A EP4236168A3 (fr) 2020-02-14 2021-02-10 Procédé et appareil de rétroaction de harq-ack dans un système de communication sans fil
EP21754321.4A EP4089944A4 (fr) 2020-02-14 2021-02-10 Procédé et appareil de rétroaction de harq-ack dans un système de communication sans fil
US17/798,223 US20230118350A1 (en) 2020-02-14 2021-02-10 Method and apparatus for feeding back harq-ack in wireless communication system

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KR10-2020-0018576 2020-02-14
KR20200018576 2020-02-14
KR1020200042982A KR20210103901A (ko) 2020-02-14 2020-04-08 무선 통신 시스템에서 harq-ack 피드백 방법 및 장치
KR10-2020-0042982 2020-04-08

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CN114285531B (zh) * 2019-09-30 2023-09-08 Oppo广东移动通信有限公司 反馈信息的发送方法、接收方法和装置

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KR20170053470A (ko) * 2015-11-06 2017-05-16 주식회사 아이티엘 반송파 집성을 지원하는 무선통신 시스템에서 harq 동작을 수행하는 장치 및 방법
WO2018155820A1 (fr) * 2017-02-24 2018-08-30 엘지전자 주식회사 Procédé de traitement de bloc de données et procédé de rétroaction harq ack/nack
KR20190031119A (ko) * 2017-09-15 2019-03-25 주식회사 케이티 코드 블록 그룹 기반의 전송 블록을 송수신하는 방법
KR20190087656A (ko) * 2017-03-17 2019-07-24 엘지전자 주식회사 무선 통신 시스템에서 단말의 데이터 전송 방법 및 장치

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US11405150B2 (en) * 2018-05-10 2022-08-02 Lg Electronics Inc. Method by which terminal transmits data in unlicensed band, and apparatus for using method
KR102642717B1 (ko) * 2018-08-10 2024-03-05 주식회사 윌러스표준기술연구소 비면허 대역에서의 채널 액세스 방법, 장치 및 시스템

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US20160065349A1 (en) * 2010-08-09 2016-03-03 Samsung Electronics Co., Ltd Transmission of harq control information from a user equipment for downlink carrier aggregation
KR20170053470A (ko) * 2015-11-06 2017-05-16 주식회사 아이티엘 반송파 집성을 지원하는 무선통신 시스템에서 harq 동작을 수행하는 장치 및 방법
WO2018155820A1 (fr) * 2017-02-24 2018-08-30 엘지전자 주식회사 Procédé de traitement de bloc de données et procédé de rétroaction harq ack/nack
KR20190087656A (ko) * 2017-03-17 2019-07-24 엘지전자 주식회사 무선 통신 시스템에서 단말의 데이터 전송 방법 및 장치
KR20190031119A (ko) * 2017-09-15 2019-03-25 주식회사 케이티 코드 블록 그룹 기반의 전송 블록을 송수신하는 방법

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EP4236168A2 (fr) 2023-08-30
US20230118350A1 (en) 2023-04-20
EP4236168A3 (fr) 2023-09-20
CN115104271A (zh) 2022-09-23
EP4089944A4 (fr) 2023-01-18

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